CN113478083A - Honeycomb core material - Google Patents
Honeycomb core material Download PDFInfo
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- CN113478083A CN113478083A CN202110839826.7A CN202110839826A CN113478083A CN 113478083 A CN113478083 A CN 113478083A CN 202110839826 A CN202110839826 A CN 202110839826A CN 113478083 A CN113478083 A CN 113478083A
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- 239000011162 core material Substances 0.000 title claims abstract description 96
- 238000003466 welding Methods 0.000 claims abstract description 94
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- -1 ferrous metals Chemical class 0.000 claims 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims 1
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- 230000006835 compression Effects 0.000 abstract description 30
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- 229910000679 solder Inorganic materials 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 9
- 230000001413 cellular effect Effects 0.000 description 6
- 210000004027 cell Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000012669 compression test Methods 0.000 description 4
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- 238000010521 absorption reaction Methods 0.000 description 3
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention discloses a honeycomb core material. The honeycomb core material is formed by welding a plurality of honeycomb wave bands, and comprises a plurality of honeycomb units, wherein the honeycomb wave bands comprise continuously arranged free edges and node edges, the node edges which are welded together correspondingly form honeycomb unit nodes, the honeycomb unit nodes are welded through laser or resistance spot welding, welding spots of the spot welding are uniformly distributed, the distance between two adjacent welding spots in the cross section direction perpendicular to the honeycomb units is d, the side length of each honeycomb unit node is A, and the value of d is less than or equal to the value of A. The value of d is set to be less than or equal to A, so that at least one welding spot support is ensured in the gradual shrinkage deformation amount of the honeycomb core cells during compression, the honeycomb core is prevented from cracking and twisting in the minimum unit during compression, the minimum unit is prevented from instability during compression of the honeycomb, the whole honeycomb is further prevented from instability, the high stability of the whole collapse curve of the honeycomb core material is ensured, and the adjustment of the collapse strength and the fluctuation of the collapse curve can be controlled.
Description
Technical Field
The invention relates to the field of honeycomb structure design and manufacture, in particular to a honeycomb core material.
Background
The honeycomb structure can absorb impact kinetic energy during collision compression and has buffering and protecting effects, and the honeycomb structure is light in weight and high in strength, so that the honeycomb structure is widely applied to the fields of impact energy absorption protection, aerospace, ships and the like with high specific strength.
At present, the main manufacturing process of the energy-absorbing honeycomb is glue joint. The crushing strength curve of the glued aluminum honeycomb or the paper honeycomb in the prior art is stable, but because the honeycombs are connected by the glue, and the materials are made of aluminum or paper, the self strength and the connection strength of the materials are limited, and the glue can lose efficacy under the high-temperature and high-pressure environment, so that the glue can not be applied to special occasions with high temperature and high pressure. Meanwhile, the strength of the aluminum honeycomb or paper material is limited, and the crushing strength of the cemented honeycomb structure is also limited.
In addition, although the prior honeycomb manufacturing has welding connection, the crushing curve of the honeycomb manufacturing is unstable, and the specific strength is insufficient. For example, the crushing curve of the existing non-adhesive welded metal honeycomb is irregular, especially stainless steel honeycomb and titanium alloy honeycomb, which cannot meet the energy absorption requirement of special occasions, for example, fig. 1 shows that the crushing curve of the stainless steel honeycomb in the prior art is unstable in fluctuation and cannot meet the requirement that the crushing strength fluctuation of the energy absorption is in a certain range.
Disclosure of Invention
The invention aims to provide a honeycomb core material, which aims to solve the technical problems of large fluctuation of crushing curves and unstable structural design and manufacture of metal honeycombs, particularly welded (non-cemented) metal honeycomb core materials in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a honeycomb core. The honeycomb core material is formed by welding a plurality of honeycomb wave bands, and comprises a plurality of honeycomb units, wherein the honeycomb wave bands comprise continuously arranged free edges and node edges, the node edges which are welded together correspondingly form honeycomb unit nodes, the honeycomb unit nodes are welded through laser or resistance spot welding, welding spots of the spot welding are uniformly distributed, the distance between two adjacent welding spots in the cross section direction perpendicular to the honeycomb units is d, the side length of each honeycomb unit node is A, and the value of d is less than or equal to the value of A.
Further, concave-convex strips are arranged on the node edges forming the honeycomb unit nodes in the direction perpendicular to the cross section.
Furthermore, concave-convex strips are arranged on two node edges forming the honeycomb unit nodes in the direction perpendicular to the cross section, and the concave-convex strips on one node edge are embedded with the concave-convex strips on the corresponding welded node edges.
Furthermore, concave-convex strips are arranged on one node edge forming the honeycomb unit node in the direction perpendicular to the cross section, and concave-convex strips are not arranged on the other node edge correspondingly welded together.
Further, the number of concave-convex strips on the honeycomb unit node is 2 or more.
Furthermore, the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle is a straight section, the two sides are forward and reverse opposite arc sections, and welding spots are distributed in the middle of the straight section.
Furthermore, the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are forward and reverse different-direction arc sections, and welding spots are distributed on the forward and reverse different-direction arc sections on the two sides; or the welding points are distributed on the positive and negative different-direction arc sections at the two sides and in the middle of the straight section.
Furthermore, the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle is a straight section, the two sides are equidirectional arc sections, and welding spots are distributed in the middle of the straight section.
Furthermore, the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are equidirectional arc sections, and welding spots are distributed on the equidirectional arc sections on the two sides; or the welding points are distributed on the equidirectional arc-shaped sections at the two sides and in the middle of the straight section.
Furthermore, the honeycomb core material is made of metal, the metal comprises non-ferrous metal and ferrous metal, the non-ferrous metal comprises titanium alloy, aluminum or magnesium alloy, and the ferrous metal comprises carbon steel, stainless steel or high-temperature alloy.
Further, during spot welding, a welding mode that a hole is formed in the middle of a welding spot and a nugget is formed on the periphery of the welding spot is adopted, or a hole opening mode of punching, rolling or cutting is adopted on a honeycomb wave band in advance to further control and adjust the specific strength of the honeycomb crushing curve fluctuation and the honeycomb core material.
By applying the technical scheme of the invention, the honeycomb unit nodes are fixed by laser or resistance spot welding, the welding spots fixed by the spot welding are uniformly distributed, the distance between two adjacent welding spots on the honeycomb unit nodes in the cross section direction perpendicular to the honeycomb unit is d, and the value of d is set to be less than or equal to the side length A of the honeycomb unit nodes, so that at least welding spot support is ensured in the gradual shrinkage deformation of the honeycomb core grid during compression, the honeycomb core can not crack or twist in the minimum unit during compression, and the minimum unit can not generate instability during compression of the honeycomb, so that the honeycomb core can not generate instability, and the high stability of the crushing Strength (Crush Strength) curve of the honeycomb core is ensured. The crushing strength of the honeycomb core material can be increased and adjusted through the convex-concave strip arrangement on the honeycomb unit nodes, and the fluctuation of the crushing curve and the specific strength of the maximum honeycomb core material can be further reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a prior art crush curve for a stainless steel honeycomb;
fig. 2 shows a schematic structural diagram of a cellular band, where 1 is a free edge and 2 is a node edge;
FIG. 3a shows a schematic view of a honeycomb core structure and a distribution of welding spots according to an embodiment of the invention;
FIG. 3b shows a schematic cross-sectional structure of the honeycomb core shown in FIG. 3 a;
FIG. 4 shows the crush curve of the stainless steel honeycomb of example 1;
FIG. 5 is a schematic view showing the structure and distribution of welding spots of a honeycomb core according to the present invention;
FIG. 6a shows a schematic view of another honeycomb core structure and weld distribution of the present invention;
FIG. 6a-1 shows a schematic view of the structure of the honeycomb core of the present invention and another weld distribution;
FIG. 6b shows a schematic cross-sectional structure of the honeycomb core shown in FIG. 6 a;
FIG. 7a shows a schematic view of the structure and distribution of the welding spots of another honeycomb core according to the present invention;
FIG. 7b shows a schematic cross-sectional structure of the honeycomb core shown in FIG. 7 a;
FIG. 8a is a schematic view showing the structure and distribution of solder joints of yet another honeycomb core of the present invention;
FIG. 8a-1 shows a schematic view of yet another honeycomb core structure and another weld distribution of the present invention;
FIG. 8b shows a schematic cross-sectional structure of the honeycomb core shown in FIG. 8 a;
FIG. 9a shows yet another honeycomb core structure of the present invention with a distribution of welds at the sides of the nodes;
FIG. 9b shows a schematic cross-sectional structure of the honeycomb core of FIG. 9 a;
FIG. 10 shows the crush curve of the stainless steel honeycomb of example 2;
fig. 11 shows the crushing curve of the stainless steel honeycomb of the honeycomb core material 1 in example 3; and
fig. 12 shows the crush curve of the stainless steel honeycomb of the honeycomb core 2 in example 3.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 2, the cellular band includes a free edge and a node edge of the cellular band, which are continuously arranged, the node edges of the two cellular bands overlap to form a cellular unit, and a plurality of cellular units form a cellular structure.
According to an exemplary embodiment of the present invention, a honeycomb core is provided. The honeycomb core material is formed by welding a plurality of honeycomb wave bands, and comprises a plurality of honeycomb units, wherein the honeycomb wave bands comprise continuously arranged free edges and node edges, the node edges which are welded together correspondingly form honeycomb unit nodes, the honeycomb unit nodes are welded through laser or resistance spot welding, welding spots of the spot welding are uniformly distributed, the distance between two adjacent welding spots in the cross section direction perpendicular to the honeycomb units is d, the side length of each honeycomb unit node is A, and the value of d is less than or equal to the value of A.
It should be noted that, in a typical embodiment of the present invention, a honeycomb unit is a regular hexagon, a side length a of the honeycomb unit at a node of the honeycomb unit is equal to other sides of the honeycomb unit, a value of a is equal to a side length of a core lattice, a value of d is not greater than a value of the side length of the core lattice, and if the honeycomb unit is not a regular hexagon, a value of d is not greater than or equal to a side length at a connection point of a welding spot, that is, the side length a at the node of the honeycomb unit.
By applying the technical scheme of the invention, the honeycomb unit nodes are fixed by laser or resistance spot welding, the welding spots fixed by the spot welding are uniformly distributed, the distance between two adjacent welding spots on the honeycomb unit nodes in the cross section direction perpendicular to the honeycomb unit is d, and the value of d is set to be less than or equal to the side length A of the honeycomb unit nodes, so that at least welding spot support is ensured in the gradual shrinkage deformation of the honeycomb core grid during compression, the honeycomb core can not crack or twist in the minimum unit during compression, and the minimum unit can not generate instability during compression of the honeycomb, so that the honeycomb core can not generate instability, and the high stability of the crushing Strength (Crush Strength) curve of the honeycomb core is ensured.
Moreover, the welded honeycomb of the present application does not fail in high stable crushing performance even under high temperature and high pressure conditions. Fig. 3a shows a schematic diagram of a honeycomb core structure and distribution of welding spots according to an embodiment of the invention (fig. 3b shows a schematic diagram of a cross-sectional structure of the honeycomb core shown in fig. 3a, wherein a represents a side length at a node of a regular hexagonal honeycomb unit, D represents a distance between opposite sides of the regular hexagonal honeycomb core, and t represents a thickness of the core material of the formed honeycomb core). The welded metal honeycomb designed and manufactured by the method ensures the high stability of a crushing Strength (Crush Strength) curve and maintains the curve in a certain range, namely the high stable crushing Strength of the welded metal honeycomb can be controlled by changing the thickness of a honeycomb waveband and the size of a honeycomb core grid. Therefore, the honeycomb core material can meet the requirement of special environments such as aerospace nuclear energy and the like on the collapse strength fluctuation of the honeycomb within a certain range and the requirement of high specific strength. In addition, the manufacturing method of the invention adopts a laser or resistance spot welding manufacturing process, the manufacturing efficiency is higher, and the production efficiency is greatly improved. The method not only can be manufactured in batches, but also can be manufactured by customizing a single piece according to special requirements.
According to a preferred embodiment of the present invention, at least one cell node of the cell is provided with a concave-convex strip along a direction perpendicular to the cross section, that is, the node edge is provided with a concave-convex strip along a direction perpendicular to the cross section, and the concave-convex strip is embedded with the concave-convex strip of the corresponding welded cell zone node. Compared with the common hexagonal honeycomb, the honeycomb structure provided by the invention has the advantages that the concave-convex strips are additionally arranged at the overlapped and spliced positions, the strength of the honeycomb structure is further increased due to the supporting effect of the arc sections, the density is almost the same as that of the common hexagonal honeycomb under the same condition, and the structural strength is greatly improved. In another embodiment of the present invention, a concave-convex strip is disposed on one of the node edges forming the node of the honeycomb unit in a direction perpendicular to the cross section, and the concave-convex strip is not disposed on the other node edge welded correspondingly together.
In an embodiment of the present invention, the honeycomb is formed by stacking honeycomb wave bands having concave-convex stripes layer by layer into a hexagonal shape, the convex edge of the node edge on the front row of honeycomb wave bands is opposite to the concave edge of the node edge on the back row of honeycomb wave bands, and the stacking position (node) of each honeycomb wave band is fixed by laser or resistance spot welding to form a stable hexagonal honeycomb core, and welding spots need to be uniformly distributed in the adopted spot welding process.
Typically, as shown in fig. 5, the concave-convex strips are arranged on two sides of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, the two sides are forward and backward opposite arc sections, and the welding points are distributed in the middle of the straight section; as shown in fig. 6a, the concave-convex strips are arranged on two sides of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, the two sides are forward and reverse different-direction arc sections, and the welding points are distributed on the forward and reverse different-direction arc sections on the two sides (fig. 6b shows a schematic cross-sectional structure diagram of the honeycomb core material shown in fig. 6a, wherein, a represents the side length of the honeycomb unit node, D represents the distance of the opposite side of the hexagonal honeycomb core grid, r represents the radius of the arc section, t represents the core material thickness of the formed honeycomb core grid, and c represents the middle straight section of the special honeycomb); as shown in fig. 6a-1, the concave-convex strips are arranged on two sides of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, the two sides are forward and reverse different-direction arc sections, and the welding points are distributed on the forward and reverse different-direction arc sections and the straight section on the two sides; as shown in fig. 7a, the concave-convex strips are disposed on two sides of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, the two sides are equidirectional arc sections, and the welding points are distributed in the middle of the straight section (fig. 7b shows a schematic cross-sectional structure of the honeycomb core material shown in fig. 7a, wherein a represents the side length at the honeycomb unit node, D represents the distance between opposite sides of the hexagonal honeycomb core lattice, r represents the radius of the arc section, t represents the core material thickness of the formed honeycomb core lattice, and c represents the middle straight section of the special honeycomb); as shown in fig. 8a, the concave-convex strips are arranged on two sides of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, the two sides are equidirectional arc sections, and welding points are distributed on the equidirectional arc sections on the two sides (fig. 8b shows a schematic cross-sectional structure diagram of the honeycomb core material shown in fig. 8a, wherein a represents the side length of the honeycomb unit node, D represents the distance between opposite sides of the hexagonal honeycomb core lattice, r represents the radius of the arc section, t represents the core material thickness of the formed honeycomb core lattice, and c represents the middle straight section of the special honeycomb); alternatively, as shown in fig. 8a-1, the concave-convex strips are disposed on two sides of at least one node of the honeycomb unit, the middle is a straight section, the two sides are arc sections in the same direction, and the welding points are distributed on the arc sections in the same direction and the straight sections on the two sides.
As shown in fig. 9a, the concave strip is disposed on one side of at least one honeycomb unit node of the honeycomb unit, the middle is a straight section, at least one side is a same-direction arc section, and the welding points are distributed on the middle straight section (fig. 9b shows a schematic cross-sectional structure of the honeycomb core material shown in fig. 9a, wherein a represents the side length at the honeycomb unit node, D represents the distance between opposite sides of the hexagonal honeycomb core lattice, r represents the radius of the arc section, t represents the core material thickness of the formed honeycomb core lattice, and c represents the middle straight section of the special honeycomb).
Through the change and the evenly distributed of d value between the solder joint, can finely tune honeycomb crushing strength and the fluctuation of honeycomb crushing strength curve, it is specifically that the value of d is less, and crushing strength fluctuation is less, and the crushing strength of three rows of solder joint honeycombs is greater than the crushing strength of two rows of solder joint honeycombs in the honeycomb core, and the crushing strength of two rows of solder joint honeycombs is greater than the crushing strength of single row solder joint honeycomb.
In a typical embodiment of the invention, during spot welding, a welding mode that nuggets are formed around holes formed in the middle of welding spots are uniformly distributed or distributed on honeycomb unit nodes according to a specific distribution is adopted, so as to achieve the purpose of more adjusting the design of a honeycomb crushing curve, or the fluctuation of the honeycomb crushing curve is further guided by punching or rolling holes on the free edge of a honeycomb waveband in advance. The design, the number, the size and the positions of the holes can be designed and determined according to the requirements of different crushing curves through different hole designs.
From the above description, it can be seen that the structure of the special honeycomb of the present invention enables the honeycomb to have a remarkably high compressive strength, the distribution of the welding spots during the welding of the honeycomb can adjust the honeycomb compressive strength and the fluctuation of the honeycomb crushing curve,
in the above-mentioned solder joint distribution, the value of d is set to be equal to or less than the side length a at the node of the honeycomb unit, the side length a at the node of the honeycomb unit is the side length of the honeycomb core lattice at the joint of the solder joints connected between the honeycomb wave bands, and for the honeycomb structures shown in fig. 5, fig. 6a-1, fig. 7a, fig. 8a-1 and fig. 9a, the value of d is also set to be equal to or less than the side length a at the node of the honeycomb unit shown in the figure, that is, the distance a between the end points of adjacent sides and at the joint of the solder joints.
The distribution and values of the welding spots are the most preferable items in the patent examples, but are not limited to the above. It should be noted that when the design that the fluctuation of the compression strength curve of the metal honeycomb core is not high is met in a general occasion, the beneficial effect of the method is also obvious, the value of d is larger than the side length A at the node of the honeycomb unit under the condition, the larger the value of d is, the larger the fluctuation of the compression strength curve of the honeycomb core material is, and no practical significance is realized until the compression failure is realized.
Further, through the honeycomb mode of punching press, roll extrusion trompil on the honeycomb area material in advance before the honeycomb shaping, the quantity of trompil, size and position can be confirmed according to the compression curve's of difference design requirement, after the honeycomb material trompil welds into the honeycomb core, the honeycomb can be regular during the compression conforms to the position of trompil and forms compression deformation, the trompil can be through the design of difference even or according to specific distribution law dispersion on the honeycomb wall to realize honeycomb compression curve design micro-adjustment's purpose.
The following examples are provided to further illustrate the advantageous effects of the present invention.
Example 1
Crushing test honeycomb core size: 100mm (length) × 100mm (width) × 100mm (height), the material is 304 stainless steel, 0.13mm thickness × core grid D6.4mm, the side length A at the honeycomb unit node is 3.70mm, the distance d between adjacent welding points is set to be 2mm, and the honeycomb wave bands provided with the concave-convex strips are overlapped layer by layer to form the hexagonal honeycomb core.
The distance d between adjacent welding spots of the honeycomb formed by the method is less than or equal to the side length A at the node of the honeycomb unit, at least welding spot support is ensured in the gradual shrinkage deformation generated by the compression of the honeycomb core cells, so that the inside of the honeycomb core does not crack or distort on the minimum unit, the overall welding strength is higher, and the welding spots are uniformly distributed, so that the collapse curve of the honeycomb is particularly stable in performance, repeated experiments prove that the overall welding strength of the laser or resistance spot welding adopted for welding the honeycomb is greater than the limit collapse strength during the compression of the honeycomb, so that the collapse and the distortion cannot occur in the honeycomb, and the collapse curve of the honeycomb is shown as the following figure 4. The crushing test adopts an electronic universal tester DNS-300 to carry out compression test, and the compression speed is tested to be 5 mm/s.
Example 2
Crushing test honeycomb core size: 100mm (length) 100mm (width) 100mm (height), 304 stainless steel is selected as a material, the thickness of 0.13mm is multiplied by the core grid D5.6mm, the side length A at the node of the honeycomb unit is 3.23mm, and the distance d between adjacent welding points is set to be 2 mm.
An electronic universal tester DNS-300 is adopted for compression test, and the compression speed is tested to be 5 mm/s. Repeated tests prove that the manufacturing method is stable and feasible. The crush strength curve is stable, see the compressive strength curve of the test of fig. 10.
Example 3
The compression test is carried out by adopting an electronic universal tester DNS-300, the compression speed is tested to be 5mm/s, and the following test data are obtained through the test: table 1, the compressive strength curves are shown in fig. 11 and 12.
TABLE 1 crushing strength test data at different stainless steel honeycomb heights
Example 4
Honeycomb core grid: 6.4mm, honeycomb strip thickness: 0.1mm, honeycomb height 32mm, honeycomb material: 304 stainless steel, the side length a at the honeycomb cell node is 3.695mm, and the distance d between adjacent welding points is set to be 2 mm. The crushing test adopts an electronic universal tester DNS-300 to carry out compression test, and the compression speed is 5 mm/s.
Table 2 comparison of honeycomb crush strength test results for several core materials of different honeycomb structures of the present invention
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the crushing strength can be adjusted by changing the thickness of the material and the size of the honeycomb core grid; the optimal specific strength of the honeycomb structure (honeycomb strength/honeycomb density) can be obtained by designing the shape of the honeycomb and the honeycomb structure; the highest and lowest fluctuation ranges of the crushing strength can be controlled by designing the distribution of welding spots of the honeycomb structure according to the corresponding honeycomb structure.
As can be seen from the above description, the structure of the special honeycomb of the present invention enables the honeycomb to have a significant high crushing strength, and the distribution of welding spots during the honeycomb welding can adjust the honeycomb compression strength and control the fluctuation range of the honeycomb compression strength curve.
D ≦ A in the solder joint distribution is the most preferable item in the embodiment of the present application, and is not limited thereto. It should be noted that, when the design that the fluctuation of the metal honeycomb core compression strength curve is not high is satisfied in a general situation, the beneficial effects of the present application are also significant, in this case, the value of d is greater than the side length a at the node of the honeycomb unit, and the value of d directly affects the fluctuation of the compression strength curve, specifically, the larger the value of d is, the larger the fluctuation of the honeycomb core compression strength curve is, and no realistic meaning exists until the compression failure.
From the above description, it can be seen that the crushing strength of the honeycomb and the fluctuation of the crushing strength of the honeycomb can be finely adjusted by the change and distribution of the d value between the welding points, specifically, the smaller the d value, the smaller the fluctuation of the crushing strength.
It can also be seen from the above description that the distribution of three rows of welding points in the honeycomb is greater than the crushing strength of two rows of welding points, and two rows of welding points are greater than the crushing strength of a single row of welding points, that is, as the arrangement of the welding points of the honeycomb in the horizontal direction increases, the more stable the compression strength curve of the honeycomb is, the smaller the fluctuation is, and the better the design controllability is.
From the above description, it can be seen that the design requirements of honeycomb compressive strength and honeycomb shrinkage curve fine tuning can be satisfied by adjusting the value of d by adopting laser perforation spot welding.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The honeycomb core material is characterized by being formed by welding a plurality of honeycomb wave bands and comprising a plurality of honeycomb units, wherein each honeycomb wave band comprises a free edge and a node edge which are continuously arranged, the node edges which are correspondingly welded together form a honeycomb unit node, the honeycomb unit node is welded through laser or resistance spot welding, welding spots of the spot welding are uniformly distributed, the distance between two adjacent welding spots in the cross section direction of each honeycomb unit is d, the side length of the honeycomb unit node is A, and the value of d is not more than the value of A.
2. The honeycomb core according to claim 1, wherein the node edges forming the node of the honeycomb unit are provided with concave-convex stripes in a direction perpendicular to the cross section.
3. The honeycomb core material according to claim 2, wherein concave-convex strips are arranged on both of the two node edges forming the node of the honeycomb unit in a direction perpendicular to the cross section, and the concave-convex strips on one node edge are embedded with the concave-convex strips of the node edges which are correspondingly welded together; or
Concave-convex strips are arranged on one of the node edges forming the honeycomb unit node in a direction perpendicular to the cross section, and concave-convex strips are not arranged on the other node edges which are correspondingly welded together.
4. The honeycomb core material according to claim 1, wherein the number of the concave-convex strips on the honeycomb unit node is 2 or more.
5. The honeycomb core material of claim 2 or 3, wherein the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are forward and backward opposite arc sections, and welding points are distributed in the middle of the straight section.
6. The honeycomb core material of claim 2 or 3, wherein the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are forward and reverse different-direction arc sections, and the welding points are distributed on the forward and reverse different-direction arc sections on the two sides;
or the welding points are distributed on the positive and negative different-direction arc sections at the two sides and in the middle of the straight section.
7. The honeycomb core material of claim 2 or 3, wherein the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are equidirectional arc sections, and welding points are distributed in the middle of the straight section.
8. The honeycomb core material of claim 2 or 3, wherein the concave-convex strips are arranged on two sides of at least one honeycomb unit node, the middle part is a straight section, the two sides are equidirectional arc sections, and welding points are distributed on the equidirectional arc sections on the two sides;
or the welding points are distributed on the equidirectional arc-shaped sections at the two sides and in the middle of the straight section.
9. The honeycomb core material of claim 1, wherein the material of the honeycomb core material is a metal, and the metal comprises a non-ferrous metal and a ferrous metal; the non-ferrous metals include titanium alloys, aluminum or magnesium alloys, and the ferrous metals include carbon steel, stainless steel or superalloys.
10. The honeycomb core material of claim 8, wherein the spot welding is performed by a welding method of forming a hole in the middle of a welding spot and forming a nugget on the periphery of the welding spot, or a hole-opening method of punching, rolling or cutting is performed on the honeycomb wave band in advance to further control and adjust the specific strength of the honeycomb crushing curve fluctuation and the honeycomb core material.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110839826.7A CN113478083B (en) | 2021-07-23 | 2021-07-23 | Honeycomb core material |
| CA3227137A CA3227137A1 (en) | 2021-07-23 | 2022-01-27 | Honeycomb core material |
| PCT/CN2022/074343 WO2023000644A1 (en) | 2021-07-23 | 2022-01-27 | Honeycomb core material |
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| CN202110839826.7A CN113478083B (en) | 2021-07-23 | 2021-07-23 | Honeycomb core material |
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| CN113478083A true CN113478083A (en) | 2021-10-08 |
| CN113478083B CN113478083B (en) | 2023-03-14 |
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| CN (1) | CN113478083B (en) |
| CA (1) | CA3227137A1 (en) |
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Cited By (2)
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| CN114309937A (en) * | 2021-12-31 | 2022-04-12 | 北斗启明（北京）节能科技服务有限公司 | Novel welding production method of stainless steel honeycomb core |
| WO2023000644A1 (en) * | 2021-07-23 | 2023-01-26 | 马鞍山安达泰克科技有限公司 | Honeycomb core material |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA3227137A1 (en) | 2023-01-26 |
| WO2023000644A1 (en) | 2023-01-26 |
| CN113478083B (en) | 2023-03-14 |
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